Flow Guide Cylinder Lifting Assembly for Czochralski Furnace
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Solution Overview
Problem
The conventional lifting mode of flow guide cylinders in Czochralski single crystal furnaces results in significant deformation, position deviation, and poor alignment, affecting crucible position judgment and single crystal formation, and requires labor-intensive disassembly for cleaning.
Innovation Solution
A lifting assembly for flow guide cylinders featuring a water-cooling lateral arm and lifting bolt with a supporting cap and positioning plate, allowing for precise adjustment and suspension, reducing deformation and alignment issues, and enabling direct cleaning of the furnace cover without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If outer lifting pins are used to lift the flow guide cylinder, then the lifting operation is simple, but the flow guide cylinder deforms significantly causing position deviation and poor alignment
Solution Approach 1:
The lifting system is divided into multiple lifting bolts distributed around the flow guide cylinder rather than using a single outer lifting pin. This segmentation distributes the lifting force evenly, preventing localized deformation and maintaining the cylindrical shape and alignment precision of the flow guide cylinder during lifting operations.
Solution Approach 2:
A supporting cap is introduced as an intermediary component between the lifting bolt and the flow guide cylinder. The supporting cap distributes the lifting force from the lifting bolt across a larger area of the flow guide cylinder, preventing direct point loading that would cause deformation and maintaining alignment precision.
2Productivity
If the flow guide cylinder is raised and lowered using conventional methods, then the lifting process is quick, but position deviation occurs affecting crucible position judgment and crystal formation
Solution Approach 1:
Multiple lifting bolts are distributed around the flow guide cylinder to provide balanced lifting force, preventing the cylinder from tilting or shifting during lifting. This maintains the positional accuracy and alignment of the crucible relative to the flow guide cylinder, enabling accurate position judgment and crystal formation while maintaining efficient lifting speed.
Solution Approach 2:
The lifting bolts are positioned and adjusted to apply force at multiple equivalent points around the flow guide cylinder, creating a balanced lifting system. This equipotential distribution of lifting forces prevents positional deviation and maintains the crucible at the correct position for accurate judgment and crystal formation.
3Ease of manufacture
If the upper thermal insulating cover is removed during cleaning, then the furnace cover can be cleaned thoroughly, but labor and time are consumed
Solution Approach 1:
The upper thermal insulating cover is merged with the flow guide cylinder assembly, allowing both components to be cleaned together as a single integrated unit. The lifting system enables the entire assembly to be raised for cleaning without disassembly, and then repositioned back, reducing cleaning time and labor while maintaining thorough cleaning capability.
Solution Approach 2:
The lifting system provides dynamic positioning capability, allowing the flow guide cylinder and upper thermal insulating cover assembly to be raised to a convenient cleaning position, cleaned thoroughly, and then lowered back into operation position. This dynamic movement eliminates the need for disassembly and reassembly, saving time and labor while ensuring thorough cleaning.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces position deviation by 11% to 5%, improves alignment and crystallization rates, and saves labor and time by allowing direct cleaning of the furnace cover, enhancing operational efficiency.
Implementation Method 1
a water-cooling lateral arm
Implementation Method 2
The lifting bolt is disposed in the flow guide cylinder lifting component, a lower end of the lifting bolt extends downward through an opening of an upper heat-insulating cover of the flow guide cylinder
Implementation Method 3
a lifting bolt, wherein the lifting bolt is disposed in the flow guide cylinder lifting component, a lower end of the lifting bolt extends downward through an opening of an upper heat-insulating cover of the flow guide cylinder, a lifting nut is disposed at an upper end of the lifting bolt, and the lifting nut is matched to the lifting bolt to raise or lower the flow guide cylinder
Implementation Method 4
the lifting nut is matched to the lifting bolt to raise or lower the flow guide cylinder
Implementation Method 5
a supporting cap is disposed on the lower end of the lifting bolt extending through the upper heat-insulating cover of the flow guide cylinder
Implementation Method 6
a positioning plate is disposed on a side of the flow guide cylinder lifting clamp close to the water-cooling lateral arm and is in contact with the water-cooling lateral arm, and the positioning plate is capable to control an angle between the flow guide cylinder lifting clamp and the water-cooling lateral arm
Data Source
AI summary
The present disclosure provides a flow guide cylinder lifting assembly, including a flow guide cylinder lifting component disposed on a water-cooling lateral arm and a lifting bolt, wherein the lifting bolt is disposed in the flow guide cylinder lifting component, a lower end of the lifting bolt extends downward through an opening of an upper heat-insulating cover of the flow guide cylinder, a lifting nut is disposed at an upper end of the lifting bolt, and the lifting nut is matched to the lifting bolt to raise or lower the flow guide cylinder.